Family Leaf-warblers (Phylloscopidae)


Numfor Leaf-warbler (Phylloscopus maforensis)


French: Pouillot de Numfor German: Numforlaubsänger Spanish: Mosquitero de Numfor

Gerygone maforensis

A. B. Meyer

, 1874,



Until recently considered conspecific with P. poliocephalus (and P. misoriensis), but assembled evidence of differentiation includes entirely olive-grey crown and face, no crownstripe, grey head sides with indistinct supercilium, greyish-olive mantle, obscure yellowish wingbar, bright yellow-green edges of remiges, dirty white throat and belly, grey-smudged breast, olive flanks, dark brown uppertail, dull plain overall plumage, horn lower mandible#R; relevant material not seen in this review and use of scoring system herein adopted therefore unfeasible, but cumulative weight of characters persuasive. In past, when regulalry lumped, the expanded species was erroneously listed in HBW and elsewhere#R as P. poliocephalus, but name maforensis has priority. Monotypic.


Numfor I, in Geelvink Bay (NW New Guinea).

Descriptive notes

c. 10 cm. A small, rather dull leaf-warbler appearing short-tailed. Adult has crown and face entirely grey with slight olive tinge (no crownstripe), grey head-sides with... read more


Song consists of relatively long slurred notes reaching very high frequencies (10 kHz); described... read more


Primary and secondary forest in lowlands and hills.

Food and feeding

No information. Diet presumably small invertebrates. Foraging behaviour presumably as that of P. poliocephalus.


No information.



Status and conservation

VULNERABLE. Restricted-range species: confined to the Geelvink Islands EBA. A very poorly known species, this warbler is restricted to the island of Numfor, where it is... read more

Recommended citation

del Hoyo, J., Collar, N. & Christie, D.A. (2019). Numfor Leaf-warbler (Phylloscopus maforensis). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 19 August 2019).